(19)

(11)

EP 1 404 429 A1

(12)

(43) Date of publication: 07.04.2004 Bulletin 2004/15 (21) Application number: 02749624.9 (22) Date of filing: 21.06.2002

(51) International Patent Classification (IPC)7: B01D 15/08 (86) International application number: PCT/US2002/019609 (87) International publication number: WO 2003/000375 (03.01.2003 Gazette 2003/01)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 22.06.2001 US 300134 P (71) Applicant: PG Research Foundation, Inc. Darien, IL 60561 (US)	(72) Inventors: YOUNG, John, E. Woodridge, IL 60517 (US) HINES, John, J. Newark, IL 60541 (US) (74) Representative: Fisher, Adrian John et al Carpmaels & Ransford,43-45 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)